Lab 2

6) Consider the following multistage amplifier. Draw the corresponding small signal model. Label, Vin, Vo1 and Vo. Do NOT make any approximations. Do NOT perform small signal analysis with this model. Just draw the small signal model. Show your work! Vin Vcc malli Q1 Re1 Vo1 Vcc ww1. Rc2 Q2 Re2 Vo

II.The following figure shows a class AB amplifier. (a) Determine the parameters of dc VB (Q1), VB (Q2), VE, ICQ, VCEQ (Q1), VCEQ (Q2). (b) For a 5-Vrms input, determine the power that is provided to the load resistor, and (c) Draw the output signal +Vcc +9 V 1.0kn D: R 5.0 V rms R2 10 kN -Vec

(1) Describe in detail the relative advantages of Class A and Class B amplifiers. In what types of circuits would Class B be advantageous over Class A (1I) With the aid of signal diagrams, describe two forms of distortion you would expect to observe on an output signal of a Class B amplifier. (III) Describe in circuit terms the advantages of a Class AB amplifier.

Q.5/ Refer to the class AB amplifier in figure below operating with a single power supply: a. Find the de parameters VB(Q1), VB(Q2), VE, IcQ, VCEQ(QI), VCEQ(Q2). b. Assuming the input voltage is 10oVpp, calculate the power delivered to the load resistor. c. What faults causing the following troubles: 1. A positive half-wave output signal 2. OV on both bases and emitters 3. No output: emitter voltage =15V 4. Crossover distortion on the output. Vcc +15 V R 1.0 kN C3 C2 D2 Q2 RL V 75 N 1.0 kN

Hand Calculation: Since you now have the values of R1 and R2 resistors, obtain numeric value of voltage gain Av=Vo/Vi, and numerical values of input and output resistances Ri and Ro. Note that you need to DC analysis first. Do a hand calculation and calculate the DC collector current or IC. This is needed in order to calculate the small signal parameters gm and rπ and in turn to obtain the Av , Ri and Ro Hence, first perform a DC analysis (use the circuit in Figure 1 and take all capacitors open) and assume your transistor has a β=140.

"Below is a small signal equivalent circuit model considering the early effect of the BJT. Find the input resistance, output resistance, and voltage gain." Rout Rc R gm Ube R.R re ± Vi RE Vo

Q.4/ Refer to the class AB power amplifier shown below: a. Determine the de parameters VB(Q1), VB(Q2), Icq, VCEQ(QI), VcCEQ(Q2). b. For the 5Vrms input, determine the power delivered to the load resistor. c. Determine the approximate input resistance seen by the signal source if Bac=100. +Vcc +9 V 1.0 k2 D1 out D2 Q2 V. 5.0 V ms RL 50 Ω R2 1.0 k2 -Vcc -9 V

help  with some explanation

Provide the detailed explanation -

Show the complete steps and the small signal model to derive the equation that represents the small-signal input resistance (Rin) of the following circuit. Rin J Ка Vcc Q₂

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Q.5/ Refer to the class AB amplifier in figure below operating with a single power supply:a. Find the dc parameters VB(Q1), VB(Q2), VE, ICQ, VCEQ(Q1), VCEQ(Q2).b. Assuming the input voltage is 10Vpp, calculate the power delivered to the load resistor.c. What faults causing the following troubles:1. A positive half-wave output signal2. 0V on both bases and emitters3. No output: emitter voltage =15V4. Crossover distortion on the output.

Q1. (a) Using the hybrid-pi model with early voltage effect, compute the small signal voltage gain, Av, input resistance and output resistance for the CE BJT amplifier shown below. Vec = 12 V B=100 VRELON) = 0.7V V = 100V R, = 93.7k2 3 R=6 kN Rg=0.5 k2 C, E R2= 6.3 k Figure Q1(a)

Please solve with work shown. Will upvote

Q.4/ Refer to the class AB power amplifier shown below:a. Determine the dc parameters VB(Q1), VB(Q2), ICQ, VCEQ(Q1), VCEQ(Q2).b. For the 5Vrms input, determine the power delivered to the load resistor.c. Determine the approximate input resistance seen by the signal source if ac=100

Q.4/ Refer to the class AB power amplifier shown below: a. Determine the de parameters VBQ1), VB(Q2), IcQ, VCEQ(QI), VCEQ(Q2). b. For the 5Vrms input, determine the power delivered to the load resistor. c. Determine the approximate input resistance seen by the signal source if Bac=100. +Vcc +9 V R 1.0 kn D Vout O D2 R 50 2 R2 1.0 k 5.0 V ms --Vcc -9 V